With much of the country is in the grips of a record-breaking deep freeze after powerful storms pummeled the East Coast with up to a foot of snow, Faith Abubey reports on the Arctic conditions and Lee Goldberg has the forecast; Martha Raddatz has the latest on the several city buses that exploded near Tel Aviv in what Israeli police have called a suspected, coordinated terror attack; Mary Bruce has details on Elon Musk with chainsaw in hand boasting of slashes to the federal bureaucracy, saying before a conservative conference "this is the chainsaw for bureaucracy;" and more on tonight's broadcast of World News Tonight with David Muir.

Suspect in deadly PA hospital hostage standoff wanted revenge: Sources; Trump defends Musk's email ultimatum to federal workers; Egg prices soar across US as Dennyâ s adds surcharge.